/**
 * Copyright (c) 2015-2016, Chill Zhuang 庄骞 (smallchill@163.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.business.common.utils;

import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class DateUtil {
	private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");

	private final static SimpleDateFormat sdfDay = new SimpleDateFormat("yyyy-MM-dd");

	private final static SimpleDateFormat sdfDays = new SimpleDateFormat("yyyyMMdd");

	private final static SimpleDateFormat sdfTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	
	private final static SimpleDateFormat sdfmsTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
	
	private final static SimpleDateFormat allTime = new SimpleDateFormat("yyyyMMddHHmmss");
	
	
	public static final String YYYYMM = "yyyy-MM";
	
	public static final String YYYYMMDD = "yyyy-MM-dd";
	
	public static final String YYYYMMDD_NOTLINE = "yyyyMMdd";
	
	public static final String YYYYMMDDHHMMSS = "yyyy-MM-dd HH:mm:ss";

	public static final String YYYYMMDDHHMMSSSSS = "yyyyMMddHHmmssSSS";


	/**
	 * 获取YYYY格式
	 * 
	 * @return
	 */
	public static String getYear() {
		return sdfYear.format(new Date());
	}

	/**
	 * 获取YYYY格式
	 * 
	 * @return
	 */
	public static String getYear(Date date) {
		return sdfYear.format(date);
	}

	/**
	 * 获取YYYY-MM-DD格式
	 * 
	 * @return
	 */
	public static String getDay() {
		return sdfDay.format(new Date());
	}
	
	
	/**
	 * 获取YYYY-MM-DD格式
	 * 
	 * @return
	 */
	public static String getDate(Date date) {
		return sdfDay.format(date);
	}

	/**
	 * 获取YYYY-MM-DD格式
	 * 
	 * @return
	 */
	public static String getDay(Date date) {
		return sdfDay.format(date);
	}

	/**
	 * 获取YYYYMMDD格式
	 * 
	 * @return
	 */
	public static String getDays() {
		return sdfDays.format(new Date());
	}

	/**
	 * 获取YYYYMMDD格式
	 * 
	 * @return
	 */
	public static String getDays(Date date) {
		return sdfDays.format(date);
	}

	/**
	 * 获取YYYY-MM-DD HH:mm:ss格式
	 * 
	 * @return
	 */
	public static String getTime() {
		return sdfTime.format(new Date());
	}
	
	/**
	 * 获取YYYY-MM-DD HH:mm:ss.SSS格式
	 * 
	 * @return
	 */
	public static String getMsTime() {
		return sdfmsTime.format(new Date());
	}
	
	/**
	 * 获取YYYYMMDDHHmmss格式
	 * 
	 * @return
	 */
	public static String getAllTime() {
		return allTime.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD HH:mm:ss格式
	 * 
	 * @return
	 */
	public static String getTime(Date date) {
		return sdfTime.format(date);
	}

	/**
	 * @Title: compareDate
	 * @Description:(日期比较，如果s>e 返回true 否则返回false)
	 * @param s
	 * @param e
	 * @return boolean
	 * @throws
	 * @author luguosui
	 */
	public static boolean compareDate(String s, String e) {
		if (parseDate(s) == null || parseDate(e) == null) {
			return false;
		}
		return parseDate(s).getTime() > parseDate(e).getTime();
	}

	/**
	 * 格式化日期
	 * 
	 * @return
	 */
	public static Date parseDate(String date) {
		try {
			return sdfDay.parse(date);
		} catch (ParseException e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 格式化日期
	 * 
	 * @return
	 */
	public static Date parseTime(String date) {
		try {
			return sdfTime.parse(date);
		} catch (ParseException e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 格式化日期
	 * 
	 * @return
	 */
	public static Date parse(String date, String pattern) {
		DateFormat fmt = new SimpleDateFormat(pattern);
		try {
			return fmt.parse(date);
		} catch (ParseException e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 格式化日期
	 * 
	 * @return
	 */
	public static String format(Date date, String pattern) {
		DateFormat fmt = new SimpleDateFormat(pattern);
		return fmt.format(date);
	}

	/**
	 * 把日期转换为Timestamp
	 * 
	 * @param date
	 * @return
	 */
	public static Timestamp format(Date date) {
		return new Timestamp(date.getTime());
	}

	/**
	 * 校验日期是否合法
	 *
	 * @return
	 */
	public static boolean isValidDate(String s) {
		try {
			sdfTime.parse(s);
			return true;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return false;
		}
	}

	/**
	 * 校验日期是否合法
	 *
	 * @return
	 */
	public static boolean isValidDate(String s, String pattern) {
		DateFormat fmt = new SimpleDateFormat(pattern);
		try {
			fmt.parse(s);
			return true;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return false;
		}
	}

	public static int getDiffYear(String startTime, String endTime) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			int years = (int) (((fmt.parse(endTime).getTime() - fmt.parse(
					startTime).getTime()) / (1000 * 60 * 60 * 24)) / 365);
			return years;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return 0;
		}
	}

	/**
	 * <li>功能描述：时间相减得到天数
	 *
	 * @param beginDateStr
	 * @param endDateStr
	 * @return long
	 * @author Administrator
	 */
	public static long getDaySub(String beginDateStr, String endDateStr) {
		long day = 0;
		SimpleDateFormat format = new SimpleDateFormat(
				"yyyy-MM-dd");
		Date beginDate = null;
		Date endDate = null;

		try {
			beginDate = format.parse(beginDateStr);
			endDate = format.parse(endDateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		day = (endDate.getTime() - beginDate.getTime()) / (24 * 60 * 60 * 1000);
		// System.out.println("相隔的天数="+day);

		return day;
	}
	
	/**
	 * <li>功能描述：时间相减得到分钟
	 * 
	 * @param beginDateStr
	 * @param endDateStr
	 * @return long
	 * @author Administrator
	 */
	public static long getMinutesSub(Date endDate) {
		long minutes = 0;
		Date beginDate = getFormatDate(new Date(), "yyyy-MM-dd HH:mm:ss");
		minutes = (beginDate.getTime() - endDate.getTime()) / (60 * 1000);
		return minutes;
	}

	/**
	 * 得到n天之后的日期
	 * 
	 * @param days
	 * @return
	 */
	public static String getAfterDayDate(String days) {
		int daysInt = Integer.parseInt(days);

		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();

		SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String dateStr = sdfd.format(date);

		return dateStr;
	}

	/**
	 * 得到n天之后是周几
	 * 
	 * @param days
	 * @return
	 */
	public static String getAfterDayWeek(String days) {
		int daysInt = Integer.parseInt(days);

		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();

		SimpleDateFormat sdf = new SimpleDateFormat("E");
		String dateStr = sdf.format(date);

		return dateStr;
	}
	
	/**
	 * 
	 * @Description 获取N天前的时间
	 * @param days
	 * @return
	 * @author Jekin
	 */
	public static String getBeforeDay(int day) {
	    
        Date date = new Date();
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.DAY_OF_MONTH, day);

        return getDay(calendar.getTime());
    }

	/**
	 * 格式化Oracle Date
	 * @param value
	 * @return
	 */
//	public static String buildDateValue(Object value){
//		if(Func.isOracle()){
//			return "to_date('"+ value +"','yyyy-mm-dd HH24:MI:SS')";
//		}else{
//			return Func.toStr(value);
//		}
//	}
	
	/**
	 * 获取某个时间单位的开始时间（0：当天；1：当月；2：当年）
	 * 
	 * @param days
	 * @return
	 */
	public static Date getBeginOfDate(String date, int type){
		Calendar calendar = new GregorianCalendar();
		calendar.setTime(parseDate(date));
		switch (type){
			case 0: 
				break;
			case 1:  
				calendar.add(Calendar.MONTH, 0);
				calendar.set(Calendar.DAY_OF_MONTH, 1);
				break;
			case 2:
				calendar.add(Calendar.YEAR, 0);
				calendar.set(Calendar.DAY_OF_YEAR, 1);  
				break;
			default:
				break;
		}		
		return calendar.getTime();
	} 
	
	/**
	 * 获取某个时间单位的结束时间（0：当天；1：当月；2：当年）
	 * 
	 * @param days
	 * @return
	 */
	public static Date getEndOfDate(String date, int type){
		Calendar calendar = new GregorianCalendar();
		calendar.setTime(parseDate(date));
		switch (type){
			case 0: 
				//calendar.add(Calendar.DATE,1);
				break;
			case 1:  
				calendar.add(Calendar.MONTH, 1);
				calendar.set(Calendar.DAY_OF_MONTH, 0);
				break;
			case 2:
				calendar.add(Calendar.YEAR, 1);
				calendar.set(Calendar.DAY_OF_YEAR, 0);
				break; 
			default:
				break;
		}
		String lastSecond = getDate(calendar.getTime()) + " 23:59:59";
		return parseTime(lastSecond);
	} 
	
	public static Date getFormatDate(Date date,String format) {
	    SimpleDateFormat formatter = new SimpleDateFormat(format);
	    String dateString = formatter.format(date);
		try {
			Date converDate = formatter.parse(dateString);
			return converDate;
		} catch (ParseException e) {
		}
	   return null;
	}
	public static void main(String[] args) {
		System.out.println(getTime(new Date()));
		System.out.println(getAfterDayWeek("3"));
	}

	/**
	 * 得到当月第一天
	 * 
	 * @param days
	 * @return
	 */
	public static Date getFirstDay() {
		Calendar canlendar = Calendar.getInstance(); // java.util包
		// 获取前月的第一天
		canlendar.add(Calendar.MONTH, 0);
		canlendar.set(Calendar.DAY_OF_MONTH, 1);
		return getFormatDate(canlendar.getTime(), YYYYMMDD);
	}
	
	
	/**
	 * 获取日期最后一天
	 * @author liangcm
	 * @param date
	 * @return
	 */
	public static Date getLastDay(Date date) {
		Calendar canlendar = Calendar.getInstance() ; // java.util包
		canlendar.setTime(date);
		canlendar.add(Calendar.MONTH, 1);
		canlendar.set(Calendar.DAY_OF_MONTH, 1);
		canlendar.add(Calendar.DAY_OF_MONTH, -1);
		return getFormatDate(canlendar.getTime(), YYYYMMDD);
	}
	
	/**
	 * 获取日期最后一天
	 * @author liangcm
	 * @param date
	 * @return
	 */
	public static Integer getLastMonthDay(Date date) {
		Calendar canlendar = Calendar.getInstance() ; // java.util包
		canlendar.setTime(date);
		canlendar.add(Calendar.MONTH, 1);
		canlendar.set(Calendar.DAY_OF_MONTH, 1);
		canlendar.add(Calendar.DAY_OF_MONTH, -1);
		return canlendar.get(Calendar.DAY_OF_MONTH);
	}
	
	/**
	 * 
	 * @Description 获取前十天的时间
	 * @return
	 * @author Jekin
	 */
	public static Date getSubDate() {
	    Date now = new Date();        
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(now);
        calendar.add(Calendar.DATE, -10);
        return calendar.getTime();
	}
	
	/**
	 * 
	 * @Description 获取日期中的日月
	 * @return
	 * @author Jekin
	 */
	public static String getDateDay(String startStr, String endStr) {
	    StringBuffer sb = new StringBuffer();
	    Date startDate = parseDate(startStr);
	    Date endDate = parseDate(endStr);
	    Calendar calendar = Calendar.getInstance();
	    calendar.setTime(startDate);
	    int startMonth = calendar.get(Calendar.MONTH);
	    int startDay = calendar.get(Calendar.DAY_OF_MONTH);
	    sb.append(startMonth);
	    sb.append("月");
	    sb.append(startDay);
	    sb.append("日-");
	    
	    calendar.setTime(endDate);
	    int endMonth = calendar.get(Calendar.MONTH);
        int endDay = calendar.get(Calendar.DAY_OF_MONTH);
        sb.append(endMonth);
        sb.append("月");
        sb.append(endDay);
        sb.append("日");
        return sb.toString();
	}


	/**
	 * 获取第几周
	 * @author liangcm
	 * @param date
	 * @return
	 */
	public static Integer getWeek(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.setFirstDayOfWeek(Calendar.MONDAY);
		calendar.setTime(date);
		return  calendar.get(Calendar.WEEK_OF_YEAR);
	}

	/**
	 * 获取明年今天
	 * @author liangcm
	 * @param date
	 * @return
	 */
	public static Date getNextYear(Date date) {
		Calendar calendar = Calendar.getInstance();
		calendar.add(Calendar.YEAR, 1);
		calendar.setTime(date);
		return  calendar.getTime();
	}

	
}
